package com.suse.forum.controller;

import com.suse.forum.common.AppResult;
import com.suse.forum.common.ResultCode;
import com.suse.forum.config.AppConfig;
import com.suse.forum.model.User;
import com.suse.forum.service.IUserService;
import com.suse.forum.utils.MD5Util;
import com.suse.forum.utils.StringUtil;
import com.suse.forum.utils.UUIDUtil;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import lombok.NonNull;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

//对Controller进行API接口的描述
@Api(tags = "用户接口")
@Slf4j
@RestController
@RequestMapping("/user")
public class UserController {

    @Resource
    private IUserService userService;

    /**
     * 用户注册
     * @param username 用户名
     * @param nickname 昵称
     * @param password 密码
     * @param passwordRepeat 重复密码
     * @return
     */
    @ApiOperation(value = "用户注册")
    @PostMapping("/register")
    public AppResult register(@ApiParam("用户名") @RequestParam("username") @NonNull String username ,
                              @ApiParam("昵称") @RequestParam("nickname") @NonNull String nickname,
                              @ApiParam("密码") @RequestParam("password") @NonNull String password,
                              @ApiParam("确认密码") @RequestParam("passwordRepeat") @NonNull String passwordRepeat) {
        //非空校验
//        if(StringUtil.isEmpty(username) || StringUtil.isEmpty(nickname) || StringUtil.isEmpty(password) || StringUtil.isEmpty(passwordRepeat)) {
//            //返回错误信息
//            return AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE);
//        }
        //校验密码与重复密码是否相同
        if(!password.equals(passwordRepeat)) {
            log.warn(ResultCode.FAILED_TWO_PWD_NOT_SAME.toString());
            //返回错误信息
            return AppResult.failed(ResultCode.FAILED_TWO_PWD_NOT_SAME);
        }

        //准备数据
        User user = new User();
        user.setUsername(username);
        user.setNickname(nickname);

        //处理密码
        //1.生成盐
        String salt = UUIDUtil.UUID_32();
        //2.生成密码的密文
        String encryptPassword = MD5Util.md5Salt(password, salt);
        //3.设置加密后的密码
        user.setPassword(encryptPassword);
        //4.设置盐
        user.setSalt(salt);
        //调用Service层的方法
        userService.createNormalUser(user);
        //返回成功信息
        return AppResult.success();
    }

    /**
     * 用户登录
     * @param username 用户名
     * @param password 密码
     * @return
     */
    @ApiOperation(value = "用户登录")
    @PostMapping("/login")
    public AppResult login(HttpServletRequest request,
                           @ApiParam("用户名")@RequestParam("username")@NonNull String username,
                           @ApiParam("密码")@RequestParam("password")@NonNull String password) {
        //1。 调用Service层的方法，放回User对象
        User user = userService.login(username, password);
        if(user == null) {
            log.info(ResultCode.FAILED_LOGIN.toString());
            //返回错误信息
            return AppResult.failed(ResultCode.FAILED_LOGIN);
        }
        //2. 如果登录成功把User对象放到Session作用域中
        HttpSession session = request.getSession(true);
        session.setAttribute(AppConfig.USER_SESSION, user);
        //3. 返回成功信息
        return AppResult.success();
    }

    @ApiOperation("获取用户信息")
    @GetMapping("/info")
    public AppResult<User> getUserInfo(HttpServletRequest request,
                                       @ApiParam("用户Id") @RequestParam(value = "id", required = false) Long id) {
        //定义返回的User对象
        User user = null;
        //根据ID的值判断User用户的获取方式
        //1.如果ID为空，从session中获取当前登录的用户信息
        if(id == null) {
            HttpSession session = request.getSession(false);
            //从session 中获取当前登录的用户信息
            user = (User) session.getAttribute(AppConfig.USER_SESSION);
        }else {
            //2.如果ID不为空，根据ID从数据库中查询用户信息
            user = userService.selectById(id);
        }


        //判断用户信息是否为空
        if(user == null) {
            return AppResult.failed(ResultCode.FAILED_USER_NOT_EXISTS);
        }
        //返回成功信息
        return AppResult.success(user);
    }


    @ApiOperation("退出登录")
    @GetMapping("/logout")
    public AppResult logout(HttpServletRequest request ) {
        //获取session对象
        HttpSession session = request.getSession(false);
        //判断session对象是否存在
        if(session != null) {
            log.info("退出成功");
            // 表示用户在登录状态，直接销毁session
            session.invalidate();
        }
        return AppResult.success("退出成功！");
    }

    /**
     *  修改个人信息
     * @param username 用户名
     * @param nickname 昵称
     * @param gender 性别
     * @param email 邮箱
     * @param phoneNum 电话号
     * @param remark 个人简介
     * @return AppResult
     */
    @ApiOperation("修改个人信息")
    @PostMapping("/modifyInfo")
    public AppResult modifyInfo(HttpServletRequest request,
                                @ApiParam("用户名") @RequestParam(value = "username",required = false) String username,
                                @ApiParam("昵称") @RequestParam(value = "nickname",required = false) String nickname,
                                @ApiParam("性别") @RequestParam(value = "gender",required = false) Byte gender,
                                @ApiParam("邮箱") @RequestParam(value = "email",required = false) String email,
                                @ApiParam("电话号") @RequestParam(value = "phoneNum",required = false) String phoneNum,
                                @ApiParam("个人简介") @RequestParam(value = "remark",required = false) String remark) {
        // 1. 接收参数
        // 2. 对参数做非空校验（全部都为空，则返回错误描述）
        if(StringUtil.isEmpty(username) && StringUtil.isEmpty(nickname)
                && gender == null && StringUtil.isEmpty(email)
                && StringUtil.isEmpty(phoneNum) && StringUtil.isEmpty(remark)) {
            // 返回错误信息
            return AppResult.failed("请输入要修改的内容");
        }
        // 3. 封装对象
        // 从session中获取ID
        HttpSession session = request.getSession(false);
        User user = (User) session.getAttribute(AppConfig.USER_SESSION);
        User updateUser = new User();
        updateUser.setId(user.getId()); // 用户ID
        updateUser.setUsername(username); // 用户名
        updateUser.setNickname(nickname); // 昵称
        updateUser.setGender(gender); // 性别
        updateUser.setEmail(email); // 邮箱
        updateUser.setPhoneNum(phoneNum); // 电话号
        updateUser.setRemark(remark); // 个人简介

        // 4. 调用Service层的方法，放回User对象
        userService.modifyInfo(updateUser);
        // 5.查询最新的用户信息
        user = userService.selectById(user.getId());
        // 6. 将最新的用户信息存入session中
        session.setAttribute(AppConfig.USER_SESSION,user);
        // 7. 返回成功信息
        return AppResult.success();
    }

    @ApiOperation("修改密码")
    @PostMapping("/modifyPwd")
    public AppResult modifyPassword(HttpServletRequest request,
                                    @ApiParam("原密码") @RequestParam("oldPassword") String oldPassword,
                                    @ApiParam("新密码") @RequestParam("newPassword") String newPassword,
                                    @ApiParam("确认密码") @RequestParam("passwordRepeat") String passwordRepeat) {
        // 1. 校验新密码与确认密码是否相同
        if(!newPassword.equals(passwordRepeat)) {
            // 返回错误信息
            return AppResult.failed(ResultCode.FAILED_TWO_PWD_NOT_SAME);
        }
        // 2. 获取当前登录的用户信息
        HttpSession session = request.getSession(false);
        User user = (User) session.getAttribute(AppConfig.USER_SESSION);
        // 3. 调用Service层的方法，放回User对象
        userService.modifyPassword(user.getId(),oldPassword,newPassword);
        // 4. 销毁session
        if(session != null) {
            session.invalidate();
        }
        // 5. 返回成功信息
        return AppResult.success();
    }
}
